One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,8,4)(10,11)(14,15)(17,18,22,21)(19,23,24,20)(25,26)(27,28)(29,32)(30,31)(2,6)(3,8)(9,10)(11,13)(12,14)(15,16)(17,19,22,24)(18,20,21,23)(25,26,29,32)(27,28,31,30)(3,8)(4,7)(10,11)(12,16)(18,21)(19,24)(27,31)(28,30) involution — undirected(1,3,5,8)(2,7,6,4)(9,11,13,10)(12,15,16,14)(17,20)(18,19)(21,24)(22,23)(25,27,29,31)(26,30,32,28)(1,4,5,7)(2,8,6,3)(9,12,13,16)(10,14,11,15)(17,21,22,18)(19,20,24,23)(25,28,29,30)(26,31,32,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.